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  2. Trachtenberg system - Wikipedia

    en.wikipedia.org/wiki/Trachtenberg_system

    The answer must be found one digit at a time starting at the least significant digit and moving left. The last calculation is on the leading zero of the multiplicand. Each digit has a neighbor, i.e., the digit on its right. The rightmost digit's neighbor is the trailing zero. The 'halve' operation has a particular meaning to the Trachtenberg ...

  3. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    Mental calculation consists of arithmetical calculations using only the human brain, with no help from any supplies (such as pencil and paper) or devices such as a calculator. People may use mental calculation when computing tools are not available, when it is faster than other means of calculation (such as conventional educational institution ...

  4. Methods of computing square roots - Wikipedia

    en.wikipedia.org/wiki/Methods_of_computing...

    A method analogous to piece-wise linear approximation but using only arithmetic instead of algebraic equations, uses the multiplication tables in reverse: the square root of a number between 1 and 100 is between 1 and 10, so if we know 25 is a perfect square (5 × 5), and 36 is a perfect square (6 × 6), then the square root of a number greater than or equal to 25 but less than 36, begins with ...

  5. Chisanbop - Wikipedia

    en.wikipedia.org/wiki/Chisanbop

    The Chisanbop system. When a finger is touching the table, it contributes its corresponding number to a total. Chisanbop or chisenbop (from Korean chi (ji) finger + sanpŏp (sanbeop) calculation [1] 지산법/指算法), sometimes called Fingermath, [2] is a finger counting method used to perform basic mathematical operations.

  6. If I Could Tell Everyone Saving For Retirement 1 Thing, I'd ...

    www.aol.com/could-tell-everyone-saving...

    Data source: Calculator.net. Chart by author. You can't even save that much? That's OK. Again, do what you can do as soon as you can do it. ... For example: one easy trick could pay you as much as ...

  7. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    A basic explanation as to how calculations are performed in a simple four-function calculator: To perform the calculation 25 + 9, one presses keys in the following sequence on most calculators: 2 5 + 9 =. When 2 5 is entered, it is picked up by the scanning unit; the number 25 is encoded and sent to the X register;

  8. These Are the 6 Social Security Changes Americans Want to See

    www.aol.com/6-social-security-changes-americans...

    Adjust the cost-of-living adjustment (COLA) calculations to better reflect senior spending. ... For example: one easy trick could pay you as much as $ 22,924 more... each year! Once you learn how ...

  9. Here's How Much You'd Need to Put in Your IRA to Save ...

    www.aol.com/finance/heres-much-youd-put-ira...

    However, we needed to go with a regular contribution schedule for calculation purposes. Monthly seemed to be a good middle-of-the-road option. ... For example: one easy trick could pay you as much ...